in‧box , in box /ˈɪnbɒks $ -bɑːks/ noun [countable]

1. the place in a computer email program where new messages arrive:
I had 130 emails in my inbox this morning.

2. American English a container on an office desk that is used to hold letters, documents etc that you must deal with Synonym : in tray British English ⇒ outbox

[TahlilGaran] Dictionary of Contemporary English ▲